#define _CRT_SECURE_NO_WARNINGS 1
class Solution {
public:
    int uniquePathsWithObstacles(vector<vector<int>>& obstacleGrid) {
        int n = obstacleGrid.size();
        int m = obstacleGrid[0].size();
        vector<vector<int>>dp(n, vector<int>(m));
        if (obstacleGrid[0][0] == 0) dp[0][0] = 1;
        for (int i = 1; i < m; i++)
        {
            if (obstacleGrid[0][i] == 0) dp[0][i] = dp[0][i - 1];
        }
        cout << dp[0][0] << endl;
        for (int i = 1; i < n; i++)
        {
            if (obstacleGrid[i][0] == 0) dp[i][0] = dp[i - 1][0];
        }
        for (int i = 1; i < n; i++)
        {
            for (int j = 1; j < m; j++)
            {
                if (i - 1 >= 0 && obstacleGrid[i - 1][j] != 1) dp[i][j] += dp[i - 1][j];
                if (j - 1 >= 0 && obstacleGrid[i][j - 1] != 1) dp[i][j] += dp[i][j - 1];
            }
        }
        if (obstacleGrid[n - 1][m - 1] == 1) return 0;
        return dp[n - 1][m - 1];
    }
};